In this article, we demonstrated the Tm/Al co-doped silica glass fabricated by the laser additive manufacturing technology for the first time. The measurements show that the glass was doped with Tm3+ concentration of 1.64 wt% without any crystallization. The Tm3+ and Al3+ were uniformly distributed, and no additional defects were introduced during the fabrication process. The glass exhibits low hydroxyl content level of 11.56 ppm. Using the prepared silica glass as the core rod, a Tm/Al co-doped photonic crystal fiber (PCF) was fabricated and performed 13.9% slope efficiency with nearly 600 mW output laser power. This novel technology provides an alternative method to fabricate Tm-doped fiber materials with high homogeneity and large core size, promoting the further spread and development of 2 μm fiber lasers.

中文翻译：

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激光增材制造技术制备Tm/Al共掺石英玻璃用于2 μm光子晶体光纤激光器

在本文中，我们首次展示了采用激光增材制造技术制备的 Tm/Al 共掺杂石英玻璃。测量结果表明，玻璃掺杂了 1.64 wt% 的 Tm3+ 浓度，没有任何结晶。Tm3+ 和 Al3+ 分布均匀，在制造过程中没有引入额外的缺陷。该玻璃显示出 11.56 ppm 的低羟基含量水平。使用制备的石英玻璃作为芯棒，制备了 Tm/Al 共掺杂光子晶体光纤 (PCF)，斜率效率为 13.9%，输出激光功率接近 600 mW。这项新技术为制备高均匀性和大纤芯尺寸的掺铊光纤材料提供了一种替代方法，促进了2μm光纤激光器的进一步普及和发展。